Fair Value Measurements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Financial Assets:
Financial Assets: Crude Oil Swaps	$ 1
Financial Assets: Natural Gas Swaps	1
Financial Assets: Natural Gas Options/Collars	4	$ 1
Financial Liabilities:
Financial Liabilities: Crude Oil Swaps		36
Financial Liabilities: Natural Gas Swaps	2	4
Financial Liabilities: Natural Gas Options/Collars	5	22
Proved Oil and Gas Properties, Other Property, Plant and Equipment and Other Assets [Abstract]
Pretax Impairment Charges for Proved Oil and Gas Properties and Other Assets, in which EOG utilized an accepted offer from a third-party purchaser	138,000
Pretax Impairment Charges for Proved Oil and Gas Properties, Other Property, Plant and Equipment and Other Assets	138,000
Proved Oil and Gas Properties, Other Property, Plant and Equipment and Other Assets Written Down During the Period - Fair value at End of Period	11,000
Proved Oil and Gas Properties, Other Property, Plant and Equipment and Other Assets Carrying Amount	149,000
Debt Disclosure [Abstract]
Estimated Fair Value of Debt	7,161,000	7,190,000
Aggregate Principal Amount of Current and Long-Term Debt	6,990,000	6,990,000
Fair Value, Inputs, Level 1 [Member]
Financial Assets:
Financial Assets: Crude Oil Swaps	0
Financial Assets: Natural Gas Swaps	0
Financial Assets: Natural Gas Options/Collars	0	0
Financial Liabilities:
Financial Liabilities: Crude Oil Swaps		0
Financial Liabilities: Natural Gas Swaps	0	0
Financial Liabilities: Natural Gas Options/Collars	0	0
Fair Value, Inputs, Level 2 [Member]
Financial Assets:
Financial Assets: Crude Oil Swaps	1
Financial Assets: Natural Gas Swaps	1
Financial Assets: Natural Gas Options/Collars	4	1
Financial Liabilities:
Financial Liabilities: Crude Oil Swaps		36
Financial Liabilities: Natural Gas Swaps	2	4
Financial Liabilities: Natural Gas Options/Collars	5	22
Fair Value, Inputs, Level 3 [Member]
Financial Assets:
Financial Assets: Crude Oil Swaps	0
Financial Assets: Natural Gas Swaps	0
Financial Assets: Natural Gas Options/Collars	0	0
Financial Liabilities:
Financial Liabilities: Crude Oil Swaps		0
Financial Liabilities: Natural Gas Swaps	0	0
Financial Liabilities: Natural Gas Options/Collars	$ 0	$ 0